Thesis
Impacts of temperature variation, rejuvenation, and testing on the surface infiltration rates of pervious concrete
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/102404
Abstract
Pervious concrete is used as a tool to manage stormwater runoff by allowing water to infiltrate through the surface of the placement. The hydraulic performance is the measure of how effectively a pervious concrete placement can control stormwater. In this study hydraulic performance is referring to the surface infiltration rate, a measure of how quickly water enters the surface of a placement. Testing was conducted quantitatively through the use of single ring infiltration tests. The hydraulic performance of pervious concrete was studied over time for 6 placements on the Washington State University Pullman Campus to measure how surface infiltration rates varied with exposure to precipitation, sediments in upstream runoff and, dry deposition. The change in hydraulic performance observed was also related to the amount of contributing impervious area produced runoff onto these surfaces. A single placement on the campus, the impacts of surface infiltration rate as temperatures varied was studied experimentally; with a mathematical model being created to compare the effects of viscosity and pore size to the change in flowrate through the surface. From these experiments it was found that clogging of the porous structure, whether due to runoff from impervious surfaces or other forms of deposition was the driving mechanism in reduced surface infiltration rates. To combat the effects of clogging, many forms of maintenance and rehabilitation methods were tested to attempt to regain lost hydraulic performance. Through both quantitative and qualitative testing, it was found that the best rehabilitation method was the use of pressurized water on the surface. Due to the continuous testing performed on these placements, the impacts of running concurrent tests were explored, it was found that the hydraulic performance of a placement decreased when testing was performed concurrently. Finally, this study looked at the infiltration of water through the subsurface by performing controlled flooding events on a pervious concrete placements and observed the rate at which water exited the subgrade. It was found that the subgrade was able to drain much more quickly than previously thought, making placements in areas with clay heavy soils a viable option.
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Details
- Title
- Impacts of temperature variation, rejuvenation, and testing on the surface infiltration rates of pervious concrete
- Creators
- Brandon Scott Werner
- Contributors
- Liv Haselbach (Chair)Tim Ginn (Committee Member) - Washington State University, Civil and Environmental Engineering, Department ofNicholas B Engdahl (Committee Member) - Washington State University, Civil and Environmental Engineering, Department of
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525029801842
- Language
- English
- Resource Type
- Thesis